> I am setting up a system with five drives. Initially two will > be for the system and three for other uses. In about 4-6 weeks > the three will be added to the original two. What does "added" mean here? Physically? Logically? If logically, in what way? And what's the starting point? If you start with 5 drives, why configure them initially as 2 arrays, and then merge later into 1 array? The exact array shapes involved matter. > Thoughts on picking a raid config to make this easy? I would > like to use raid-10, but I don't see a way to grow it. What's "this"? Do you want to end up with a 5-drive array? If so, where are you going to put the boot filesystem (most BIOSes require single drive boot filesystems) unless it is a 5 drive RAID1? In which case, growing is easy :-). More generally, my usual story: growing an array is a dangerous and slow operation. Backup and restore is usually a lot faster, results in a better physical to logical layout, and safer (and one should backup anyhow before growing). BTW I was just looking at his home page for other reasons (NFSv4) and noticed this: http://neil.brown.name/hg "LaFS Log Structured File system for Linux - VERY alpha Neil Brown 7 weeks ago RSS". -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html